Pennsylvania

• Adams 42001
  1,101 taxa Open ↗
• Allegheny 42003
  1,943 taxa Open ↗
• Armstrong 42005
  1,126 taxa Open ↗
• Beaver 42007
  1,402 taxa Open ↗
• Bedford 42009
  1,989 taxa Open ↗
• Berks 42011
  2,115 taxa Open ↗
• Blair 42013
  1,613 taxa Open ↗
• Bradford 42015
  1,111 taxa Open ↗
• Bucks 42017
  2,298 taxa Open ↗
• Butler 42019
  1,422 taxa Open ↗

Showing 1,551–1,600 of 2,748 (native).

• 
  Magnolia acuminata (L.) L. Native MAAC

  cucumber tree · Magnoliaceae 47 counties
• 
  Magnolia grandiflora L. Native MAGR4

  southern magnolia · Magnoliaceae 1 county
• 
  Magnolia macrophylla Michx. Native MAMA2

  bigleaf magnolia · Magnoliaceae 1 county
• 
  Magnolia tripetala (L.) L. Native MATR

  umbrella-tree · Magnoliaceae 13 counties
• 
  Magnolia virginiana L. Native MAVI2

  sweetbay · Magnoliaceae 10 counties
• 
  Mahonia repens (Lindl.) G. Don Native MARE11

  creeping barberry · Berberidaceae 1 county
• 
  Maianthemum canadense Desf. Native MACA4

  Canada mayflower · Liliaceae 65 counties
• 
  Maianthemum racemosum (L.) Link Native MARA7

  feathery false lily of the valley · Liliaceae 67 counties
• 
  Maianthemum racemosum (L.) Link ssp. racemosum Native MARAR

  feathery false lily of the valley · Liliaceae 67 counties
• 
  Maianthemum stellatum (L.) Link Native MAST4

  starry false lily of the valley · Liliaceae 19 counties
• 
  Maianthemum trifolium (L.) Sloboda Native MATR4

  threeleaf false lily of the valley · Liliaceae 14 counties
• 
  Malaxis bayardii Fernald Native MABA6

  Bayard's adder's-mouth orchid · Orchidaceae 8 counties
• 
  Malaxis brachypoda (A. Gray) Fernald Native MABR5

  white adder's-mouth orchid · Orchidaceae 6 counties
• 
  Malaxis unifolia Michx. Native MAUN

  green adder's-mouth orchid · Orchidaceae 36 counties
• 
  Malus coronaria (L.) Mill. Native MACO5

  sweet crab apple · Rosaceae 51 counties
• 
  Marshallia grandiflora Beadle & F.E. Boynt. Native MAGR7

  Monongahela Barbara's buttons · Asteraceae 1 county
• 
  Matelea obliqua (Jacq.) Woodson Native MAOB2

  climbing milkvine · Asclepiadaceae 13 counties
• 
  Matteuccia struthiopteris (L.) Todaro Native MAST

  ostrich fern · Dryopteridaceae 49 counties
• 
  Medeola virginiana L. Native MEVI

  Indian cucumber · Liliaceae 67 counties
• 
  Meehania cordata (Nutt.) Britton Native MECO

  Meehan's mint · Lamiaceae 7 counties
• 
  Melampyrum lineare Desr. Native MELI2

  narrowleaf cowwheat · Scrophulariaceae 54 counties
• 
  Melampyrum lineare Desr. var. lineare Native MELIL3

  narrowleaf cowwheat · Scrophulariaceae 54 counties
• 
  Melampyrum lineare Desr. var. pectinatum (Pennell) Fernald Native MELIP2

  narrowleaf cowwheat · Scrophulariaceae 2 counties
• 
  Melica nitens (Scribn.) Nutt. ex Piper Native MENI

  threeflower melicgrass · Poaceae 8 counties
• 
  Menispermum canadense L. Native MECA3

  common moonseed · Menispermaceae 44 counties
• 
  Mentha arvensis L. Native MEAR4

  wild mint · Lamiaceae 64 counties
• ⚘
  Mentha ×piperita L. (pro sp.) [aquatica × spicata] Native MEPI

  peppermint · Lamiaceae 58 counties
• 
  Menyanthes trifoliata L. Native METR3

  buckbean · Menyanthaceae 19 counties
• 
  Menziesia pilosa (Michx. ex Lam.) Juss. ex Pers. Native MEPI2

  minniebush · Ericaceae 7 counties
• 
  Merremia dissecta (Jacq.) Hallier f. Native MEDI2

  noyau vine · Convolvulaceae 1 county
• 
  Mertensia virginica (L.) Pers. ex Link Native MEVI3

  Virginia bluebells · Boraginaceae 45 counties
• 
  Micranthemum micranthemoides (Nutt.) Wettst. Native MIMI6

  Nuttall's mudflower · Scrophulariaceae 2 counties
• 
  Mikania scandens (L.) Willd. Native MISC

  climbing hempvine · Asteraceae 15 counties
• 
  Milium effusum L. Native MIEF

  American milletgrass · Poaceae 26 counties
• 
  Milium effusum L. var. cisatlanticum Fernald Native MIEFC

  American milletgrass · Poaceae 26 counties
• 
  Mimosa nuttallii (DC. ex Britton & Rose) B.L. Turner Native MINU6

  Nuttall's sensitive-briar · Fabaceae 1 county
• 
  Mimulus alatus Aiton Native MIAL2

  sharpwing monkeyflower · Scrophulariaceae 32 counties
• 
  Mimulus guttatus DC. Native MIGU

  seep monkeyflower · Scrophulariaceae 1 county
• 
  Mimulus moschatus Douglas ex Lindl. Native MIMO3

  muskflower · Scrophulariaceae 18 counties
• 
  Mimulus moschatus Douglas ex Lindl. var. moschatus Native MIMOM2

  muskflower · Scrophulariaceae 18 counties
• 
  Mimulus ringens L. Native MIRI

  Allegheny monkeyflower · Scrophulariaceae 67 counties
• 
  Mimulus ringens L. var. ringens Native MIRIR

  Allegheny monkeyflower · Scrophulariaceae 67 counties
• 
  Minuartia glabra (Michx.) Mattf. Native MIGL5

  Appalachian stitchwort · Caryophyllaceae 5 counties
• 
  Minuartia michauxii (Fenzl) Farw. Native MIMI2

  Michaux's stitchwort · Caryophyllaceae 18 counties
• 
  Minuartia michauxii (Fenzl) Farw. var. michauxii Native MIMIM

  Michaux's stitchwort · Caryophyllaceae 17 counties
• 
  Minuartia patula (Michx.) Mattf. Native MIPA6

  pitcher's stitchwort · Caryophyllaceae 3 counties
• 
  Mirabilis albida (Walter) Heimerl Native MIAL4

  white four o'clock · Nyctaginaceae 1 county
• 
  Mirabilis linearis (Pursh) Heimerl Native MILI3

  narrowleaf four o'clock · Nyctaginaceae 1 county
• 
  Mirabilis nyctaginea (Michx.) MacMill. Native MINY

  heartleaf four o'clock · Nyctaginaceae 32 counties
• 
  Mitchella repens L. Native MIRE

  partridgeberry · Rubiaceae 67 counties